3D Tiles Bounding Volume

I created tileset with bounding volumes (regions) and set debugShowBoundingVolume variable to true in Cesium.
When I run my application red Bounding Volumes appear but when loading is complete they disappear.
I no have idea why it is happening.

Here is tileset.json file that I'm using.

Do you have idea why it is happening?

{
  "asset": {
    "version": "1.0"
  },
  "root": {
    "boundingVolume": {
      "region": [
        0.43286999864208703,
        1.0502595044768601,
        0.43298661281518169,
        1.050298006439282,
        0.0,
        100.0
      ]
    },
    "geometricError": 40.0,
    "content": {
      "url": "../Models/Tiles3DModels/Leaf_tree1.i3dm"
    },
    "refine": "ADD",
    "children": [
      {
        "boundingVolume": {
          "region": [
            0.43286999864208703,
            1.0502627333359764,
            0.43290473069332436,
            1.0502974653872133,
            0.0,
            100.0
          ]
        },
        "geometricError": 20.0,
        "content": {
          "url": "../Models/Tiles3DModels/Leaf_tree2.i3dm"
        },
        "children": [
          {
            "boundingVolume": {
              "region": [
                0.43295188076394425,
                1.0502595044768601,
                0.43298661281518169,
                1.0502942365280974,
                0.0,
                100.0
              ]
            },
            "geometricError": 0.0,
            "content": {
              "url": "../Models/Tiles3DModels/Leaf_tree3.i3dm"
            }
          }
        ]
      }
    ]
  },
  "geometricError": 200.0
}

I’m not sure, I personally haven’t seen that happen before. Can you send me the full tileset so I can see if I can replicate it on my end?